fingerprints2011-per

FINGERPRINTS
Why do we have them?

• It is used to identify people because no one has the same fingerprints
• They enhanse our sence of touch, the bumps create small vibration which are picked up easier than smooth skined fingertips.

Classifications

• It is the pattern of the ridges on someones finger
• Helps identify who you are
• However if the person has had a slight injury to their fingers such as abrasions or cuts that dont affect the dermal papillae the prints will regenerate, but if it dermal papillae is destroyed the ridges will not come back.

Classification patterns

ARCH

Loop

Whorl

Arch Loop Whorl

Types of Fingerprint Patterns

PLAIN ARCH

TENTED ARCH

PLAIN LOOP

Plain Arch Tented Arch Plain Loop

PLAIN LOOP

WHORL

CENTRAL POCKET LOOP

Plain Loop Whorl Central Pocket Loop How to test for them

• Dusting for them using powders and tape to lift them
• ink pads when they have the person
• scanning software on cumputers

Interesting facts about fingerprints

• The ridges that the fingerprints create cause viberations which are up to 100 times more sensative than if they were smooth
• Formed before birth
• They are formed under the skin
• Can be affected by health issues
• Identical twins dont have the same fingerprints

How are they used for criminal investigations?

• They can provide hard evidence in the courtroom
• It can identify a criminal based just off of the fingerprint alone
• They can prove the innocents or guilt of a person

Can fingerprints be fake?

• Yes they can be faked
• They can be copied by using super glue to pick up the print